Effects of grading on the main quality attributes of peanut kernels

Near infrared reflectance spectroscopy (NIRS) analysis of peanut kernels of different grades by mainly using advanced breeding lines derived from intersectional crosses in two experiments gave similar results, showing remarkable inter-grade variation in oil content of a specific entry. The effects of genotype on qualitative attributes proved to be predominant. No significant differences in protein content, oleic acid/linoleic acid content in total fatty acids, and oleic acid/linoleic acid ratio were detected among the No. 1, No. 2 and No. 3 grade peanut kernels of a given peanut genotype.